class_docstr: Example of integrating with Tkinter.
code: def _onTimeout(self):
      self.root.update()
      self.loop.call_later(0.03, self._onTimeout)
  
file_path: ib_insync/examples/tk.py
imports: import asyncio
  import tkinter
  from ib_insync import IB, util
  from ib_insync.contract import *
label_desc: Use image node_id 4 for calling the TkApp obj's underlying member method code with example usage: obj._onTimeout() without return types